25902947109 has 32 divisors (see below), whose sum is σ = 38517792768. Its totient is φ = 15376248000.

The previous prime is 25902947099. The next prime is 25902947131. The reversal of 25902947109 is 90174920952.

It is not a de Polignac number, because 25902947109 - 2¹² = 25902943013 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25902947909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341554 + ... + 410444.

It is an arithmetic number, because the mean of its divisors is an integer number (1203681024).

Almost surely, 2^25902947109 is an apocalyptic number.

It is an amenable number.

25902947109 is a deficient number, since it is larger than the sum of its proper divisors (12614845659).

25902947109 is a wasteful number, since it uses less digits than its factorization.

25902947109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69249.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 25902947109 in words is "twenty-five billion, nine hundred two million, nine hundred forty-seven thousand, one hundred nine".